3/4" FPT X 1" FPT Relief Valve Reduced Capacity

Designed to provide emergency relief from excessive pressure in refrigerant-containing vessels, these valves are built in strict conformance with ASME Boiler and Pressure Vessel Code requirements for safety relief devices. Each valve bears the ASME code symbol of certification (UV). Their capacities are rated by the National Board of Boiler and Pressure Vessel Inspectors. These tamper-resistant valves are accurately set and sealed by qualified technicians at the factory.

Hansen pressure-relief valves help meet the requirements of ANSI/ASHRAE 15 Safety Standard for refrigeration systems as well as other worldwide codes. This standard requires pressure vessels of all refrigeration systems to be protected by a pressure-relief device or other approved means to safely relieve pressure in the event of fire or other abnormal conditions. Once installed, a properly selected Hansen pressure-relief valve is ready to vent to atmosphere any temporary excessive overpressure inside of a vessel. After discharge, these valves will attempt to reseat to minimize loss of refrigerant. However, once any relief valve has discharged, it must be replaced as soon as possible because debris may have settled on the seat during discharge. Hansen pressure-relief valves should be connected to the vapor space of refrigerant vessels, heat exchangers, oil pots, oil stills, pilot receivers, and elsewhere as may be required by various codes.

Hansen H5600 series pressure-relief valves come equipped with Hansen’s patented POP-EYE technology as standard. POP-EYE detects when a relief valve lifts and indicates at the valve via flashing red LED.

Rupture disc assemblies are required when using Hansen pressure-relief valves for halocarbon applications because the high cost of such refrigerants demands extreme tightness. This must be purchased separately.

Hansen H5600 series pressure-relief valves must be replaced after 5 years of service in application, however once a valve discharges, it must be replaced as soon as possible.